Brush electrode



Aug. 25, 1970 DUDEK ET AL 3,525,847

BRUSH ELECTRODE Filed Dec. 20, 1967 Jozef DUDEK J an GOCZAL Jan GOLEKLeslaw KUS Kazimierz MARKIEL'IICZ IN! 'EXTOR United States Patent Office3,525,847 Patented Aug. 25, 1970 US. Cl. 219-119 2 Claims ABSTRACT onTHE DISCLOSURE Flat brush electrode for direct heating the metal strips,provided with two chambers arranged inside a body, through which thecoolant flows, in order to endow the strip with desired strengthproperties.

BACKGROUND OF THE INVENTION The invention relates to a fiat-brushelectrode being applicable for the resistance heating of metal stripmaterial, especially of rolled strips.

In the manufacturing practice there were not hitherto known devicesrendering it possible to heat rolling strips for heat treatment in aproduction line.

SUMMARY OF THE INVENTION The invention provides flat brush electrodes,which used in a suitable arrangement, e.g. as described in commonlyowned application Ser. No. 685,858, enables the resistance heating ofstrips being worked, immediately in the manufacturing line. This aim hasbeen achieved by designing of flat cards including cooling chambers anda control valve.

BRIEF DESCRIPTION OF THE DRAWING An embodiment of the brush electrodeaccording to the invention is shown in the accompanying drawing, inwhich:

FIG. 1 is a side view of the electrode assemblies supplying the electriccurrent to the strip;

FIG. 2 is a section along the line AA of FIG. 1; and

FIG. 3 is a section along the line B-B of FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENT The brush electrode according tothe invention comprises a body 1 with a cooling chamber 2 and a waterspray chamber 3, wires 4 soldered in the wall of the body 1, a wall 5,water circuit pipes 6, 7, 8, a special control valve 9, a guiding sleevetravelling along the guide b, and a flexible current-carrying wire 11.The brush electrode according to the invention supplies the heatingcurrent to the metal strip a travelling in course of the productionprocess, where the electrode is usually composed of two pairs of brushesdislocated at a suitable distance (see the aforementioned application).The electrodes, composed of two pairs of brushes are shiftedsimultaneously against each another by means of a mechanism not beingshown in the drawing. Thus a constant pressure of the wires against bothsurfaces of the strip is being secured. The guide [1 and the guidingsleeve 8 secure the parallelity of the brushes against each another. Thevalve 9 being positioned as shown in FIG. 2 supplies the water afterpassing it through the cooling chamber 2 to the water spray chamber 3,onto the heated strip. Such positioning of the valve is set for the pairof brushes, between which the strip comes after heating, for the pair ofbrushes, however, between the cold strip comes, the valve should berevolved by in relation to the position shown in FIG. 2, when the waterflows out, after passing through the cooling chamber.

The brush electrode according to the invention ensures a suitablecontact area between it and the heated strip at minimum resistancesbraking the travel of the strip, what is of great importance in aspectof the considerable decrease of the strength of heated strip. Throughapplication of the water spray chamber a desired heat treatment processe.g. solutioning or hardening may be'performed immediately. Thestructure of the electrode is simple and suited for heating of thestrips undergoing a heat treatment.

What is claimed is:

1. A fiat-brush-electrode assembly for the heat treatment of metalstrip, comprising a holder formed with a compartment and with acoolant-receiving chamber, said holder being provided with outlet meanscommunicating with said chamber and trained upon said strip fordirecting coolant onto a surface thereof; a brush on said holder andincluding a generally flat array of wire bristles soldered to a wall ofsaid compartment and extending codirectionally therefrom toward saidsurface of said strip, said bristles being in heat-conducting andelectrically conducting relationship with said holder, said compartmentforming a coolent circulation path; conduit means in said holdercommunicating with said path and with said chamber for feeding coolantto said chamber and said path and for removing coolant from said path;and valve means connected to said conduit means for selectivelycontrolling the coolant flow to said chamber and along said path.

2. The assembly defined in claim 1 wherein two such holders andrespective brushes are provided in symmetrically juxtaposed relation onopposite sides of a transport path from said strip.

References Cited UNITED STATES PATENTS 453,162 5/1891 Ries 219 2,323,9037/1943 Fentress 219-81 2,826,676 3/1958 Fullerton et a1. 219-119 JOSEPHV. TRUHE, Primary Examiner L. A. ROUSE, Assistant Examiner US. Cl. X.R.219-420

